deepthi912 opened a new pull request, #18860:
URL: https://github.com/apache/pinot/pull/18860

   Force download rebuilds a segment from its original deep-store copy, 
discarding the server-side upsert/dedup metadata for that segment. When the 
table uses metadataTTL/deletedKeysTTL to expire primary keys, the original copy 
still contains keys that the TTL has already expired or deleted, so force 
download can resurrect them and produce incorrect query results.
   
   This PR rejects reload requests with forceDownload=true on:
   - upsert tables with metadataTTL or deletedKeysTTL set
   - dedup tables with metadataTTL set


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